Tieline Commander G3 TLR300, Reference Manual

Page: 250 / 383

Section 25: GSM LL/GSM/USB-3G Tab
T ieline
Page 250
T E C H N O L O G Y
This drop-down menu allows the appropriate network
connection to be selected.
By default
T
ieline codecs are programmed to auto–detect the
network that a module supports. If a GSM module is inserted
into a codec it will automatically detect that the module is for
GSM use and display a connection preprogrammed to make
a 9,600bps GSMCSD call.
If a 3G USB module is inserted into a codec it will automatically detect that the
module is for 3GIP use and display a connection preprogrammed to make a 3G
call. The easiest way to change any default settings is to use the codec
configuration wizard.
To change the default setting, click on the drop-down menu arrow and select the
network you require by highlighting and clicking on it. Following is an
explanation of the settings in this menu.
Codec Settings Explanation of Setting
AUTO-DETECT Auto-detects a GSM, USB or 3G module inserted into
a codec and configures the module for
preprogrammed settings.
GSM CSD – POTS Programs a codec GSM module for a GSM CSD call
to a POTS line.
GSM HSCSD – POTS Programs a codec GSM module for a GSM HSCSD
call to a POTS line.
3GCSD/PHS This setting is used for 3GCSD connections in Japan.
3G/UMTS IP Programs a codec for a 3GIP call.
GSM VOICE (Analog) Programs a GSM module to make a voice call over a
POTS line.
26.10. GSM Pre Buf Secs (for a codec connecting with a GSM
connection)
The nature of GSM transmissions means information is sent in ‘bursts’.
Sometimes this can lead to program drop-outs. If you find you are getting
program drop-outs, you can attempt to circumvent them by delaying the time-
frame in which packets of information are sent. In effect you are creating a
buffer. 1-2 seconds is usually sufficient to avoid any problems but the delay can
be set up to 9 seconds if required. Program signals will be delayed by the amount
of time set in this menu. You only need to adjust this setting if the GSM
connected codec is having problems receiving audio. If you are still getting
program drop-outs after adjusting this setting, it could be due to network
congestion. Hang up the connection and try to reconnect in a short while.
(Related topic: GSM Operation)